X-Value Adjustment (XVA, xVA) is an umbrella term referring to a number of different "valuation adjustments" that banks must make when assessing the value of derivative contracts that they have entere
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d030681a6aebf737ee072d09d2b905e2b22b5292bff7e4a001be58971330291. Chain 2 (Bitcoin): anchored in block 953616 (2026-06-14T08:58:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/178681a0-caf8-42c2-9caf-073e66f4e7c7.json and https://artists.proofprofile.net/proofs/artist/178681a0-caf8-42c2-9caf-073e66f4e7c7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).